package com.example.blog.web.adminController;

import com.example.blog.pojo.Tag;
import com.example.blog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {
    @Autowired
    private TagService TagService;
    @GetMapping("/tags")
    public String Tags(@PageableDefault(size = 6,sort = {"id"},
            direction = Sort.Direction.ASC)Pageable pageable, Model model){
        model.addAttribute("page",TagService.listTag(pageable));
        return "admin/tags";
    }
    @GetMapping("/tags/{id}/tagsInput")
    public String editInput(@PathVariable Long id,Model model){
        model.addAttribute("tag",TagService.getTag(id));
        return "admin/tag-input";
    }
    @GetMapping("/tags/{id}/delete")
    public String deleteTag(@PathVariable Long id,RedirectAttributes attributes){
        attributes.addFlashAttribute("message","删除成功");
       TagService.deleteTag(id);
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/input")
    public String TagInput(Model model)
    {
        model.addAttribute("tag",new Tag());
        return "admin/tag-input";
    }
    @PostMapping("/tags1")
    //@Valid --校验 BindingResult 接受校验的message信息
    public String post(@Valid Tag Tag, BindingResult result, RedirectAttributes attributes){
        if(TagService.getTagByName(Tag.getName()) !=null){
            attributes.addFlashAttribute("message","不能重复添加");
            return "redirect:/admin/tags/input";
        }
        if(result.hasErrors()){
            attributes.addFlashAttribute("message","输入不能为空");
            return "redirect:/admin/tags/input";
        }
        Tag Tag1 = TagService.saveTag(Tag);
        if(Tag1 == null){
            attributes.addFlashAttribute("message","操作失败");
        }
        else {
            attributes.addFlashAttribute("message","操作成功");
        }
        return "redirect:/admin/tags";
    }
}
